-- Hi, this is the lock-part of my vault framedoor system.
-- The problem im having, is that when i run the 2nd program (bundled controle program), i get this error:
-- "door:3: Too long without yeilding"
-- I cant figure out what the problem is, I need help! D:

Program 1: Lock program (This program works fine, just wanted to include it so you could see the entire system)

term.clear()
term.setCursorPos(2, 1)
term.write("-------------------------------------------------")
term.setCursorPos(2, 1)
term.write("-------------------------------------------------")

function Write()
  term.write("|")
  end
  
for i=1,17 do
  term.setCursorPos(51, i+1)
  Write()
end

for i=1,17
  term.setCursorPos(1, i+1)
  Write()
end

term.setCursorPos(15, 7)
term.write("The vault is locked!")
term.setCursorPos(21, 9)
term.write("Password: ")
term.setCursorPos(21, 10)

X = read("*")
pass = "Notrelevant"
pass2 = "Notrelevant"
pass3 = "Notrelevant"

if X == pass then
  term.setCursorPos(19, 11)
  term.write("password #2: ")
  term.setCursorPos(21, 12)
  sleep(1)
   Y = read("*")
   if Y == pass2 then
     term.setCursorPos(19, 13)
	 term.write("Password #3: ")
	 term.setCursorPos(21, 14)
	 sleep(1)
	  Z = read("*")
	   if Z == pass3 then
	     term.setCursorPos(14, 15)
		 term.write("Correct, you may enter")
		 redstone.setOutput("left", true)
		 sleep(3)
		 redstone.setOutput("left", false)
		 sleep(3)
		 os.reboot()
		 end
	    else
		term.setCursorPos(21, 15)
		term.write("False, try again")
		sleep(3)
		os.reboot()
		end
	   else
	   term.setCursorPos(21, 13)
	   term.write("False, try again")
	   sleep(3)
	   os.reboot()
	   end
	  else
	  term.setCursorPos(21, 11)
	  term.write("False, try again")
	  sleep(3)
	  os.reboot()
	  end
sleep(3)
os.reboot

Now, here is the 2nd program. There is a red alloy wire from the left of computer #1 to the left of computer #2, which is behind a wall. Computer #1 is in the wall.
I intend Computer #2 to open a frame door, when it recieves a redstone signal from Computer #1.
I want it to also close the frame door, when its provided with a redstone signal, under computer #2.


while true do
i = 0

if(redstone.getInput("left")) then

function open()
rs.setBundledOutput("right", colors.orange)
sleep(.5)
c = colors.subtract(colors.orange)
rs.setBundledOutput("right", c)
sleep(.5)
end

open()
open()
pulse = i+2
limit = 2

elseif pulse == limit then
  redstonedown = redstone.getInput("bottom")
  if redstonedown == true then
  
function close()
rs.setBundledOutput("right", colors.white)
sleep(.5)
Y = colors.subtract(colors.white)
rs.setBundledOutput("right", Y)
sleep(.5)
end

close()
close()
pulse = i-2
end
end
end
sleep(3)
os.reboot()


Upon running this program, I get this error: 

door:3: Too long without yeilding

Please help me D: